411772
domain: N
Appears in sequences
- a(n) = (7^n+1)/2.at n=7A034494
- The terms of A055258 (sums of two powers of 7) divided by 2.at n=28A073218
- a(n) = C(3,n) DELTA C(0,n).at n=36A147724
- a(n) = ceiling(n^n/2).at n=7A168658
- Number of compositions of even natural numbers in 7 parts <= n.at n=6A191494
- T(n,k)=Number of nXk 0..3 arrays with values 0..3 introduced in row major order and no element equal to any horizontal or vertical neighbor.at n=37A198715
- T(n,k)=Number of nXk 0..5 arrays with no element equal to another within a city block distance of two, and new values 0..5 introduced in row major order.at n=46A206396
- T(n,k)=Number of 0..3 colorings of an nx(k+1) array circular in the k+1 direction with new values 0..3 introduced in row major order.at n=35A214112
- Numbers z such that x^2 + y^7 = z^2 (with positive integers x and y) and gcd(x, y, z) = 1.at n=11A293693
- a(n) is the smallest positive integer of length (distance from origin) n in the Cayley graph of the integers generated by all powers of 7.at n=21A297180